Armature-winding machine



Oct. 8,1963 v v J. BL; 3,106,353-

ARMATURE-WINDING MACHINE Filed May 23, 1960 INVENTOR JOSEPH BLIK 3 4 we AGENT United States Patent O 3,106,353 ARMATURE-WINDING MACHINE Joseph Blik, The Hague, Netherlands, assignor, by mesne assignments, to North American Philips Company, Inc, New York, N.Y., a corporation of Delaware 7 Filed May 23, 1960, Ser. No. 30,860 Claims priority, application Netherlands May 21, 1959 Claims. (Cl. 24213) The invention relates to an armature-winding machine in which a central shaft capable of accommodating the armature is surrounded by a plurality of coil holders for the winding wire and by the same number of wire guides, the machine comprising a driving mechanism constructed in a form such that winding wire supplied by the wire guides can be arranged in the armature slots, the armature and the wire guides performing a rectilinear periodically reversible movement and being adapted to turn through an angle relatively to each other in the period of the reversal of the said moment or immediately before it, the wire guides being, moreover radially movable with respect to the central shaft.

Such an armature-Winding machine is known from US. patent specification No. 2,381,750. By means of this known machine all slots of an armature can be simultaneously wound and the winding thus obtained is, outside the slots, shaped in the form of a honeycomb, which means that the armature wires are stacked up crosswise above the head surf-aces of the armature. However, this known machine has the disadvantage that the armature slots are not correctly filled withwinding wire, so that the copper filling factor is fairly unfavourable. The winding heads are rather slack, which is disadvantageous, since during the rotation of the armature, the wires of the winding head may be swung to the outer side owing to the centrifugal force. This gives rise to breakage of the wire and to a reduction of the electric insulation. The heads may, it is true, be reinforced by providing lacquer or another adhesive, but this is not sulficient.

A further disadvantage of the known device consists in that the structure is fairly complicated and that many parts are required, which involves a greater risk of disturbance in the operation.

The invention has for its object to provide an armature-winding machine of the kind set forth, which is capable of filling the armature slots uniformly and most completely, whilst the invention has furthermore for its object to permit the use of very simple and cheap component parts for this machine.

The armature-winding machine according to the invention is characterized in that the wire guides are coupled via a bent lever with a ring, which is adapted to turn about the shaft and of which the movement is limited on the one hand by a stop, against which the ring is drawn by spring action, and is controlled on the other hand by a force derived from the driving gear of the machine, the arrangement being'such that the amplitude of the radial movement of the wire guides is variable.

A very simple structure consists in that the central shaft is surrounded by a frame capable of moving parallel to this shaft and coupled by an eccentric with a cam disc driven by the driving shaft of the machine, which cam disc is capableof turning periodically the shaft accommodalting the armature to be wound in two opposite directions, this frame comprising a platform on which the wire guides are mounted, as Well as the ring for the radial movement of the wire guides, which ring is coupled by means of a chain or the like with a disc provided on the said frame, of which the movement is adjustably controlled by the movements of the frame. On the frame is preferably provided an endless chain arranged along aset of discs, of which one is coupled with the disc controlling the movements of the ring causing the wire guides to move, this chain having adjustable barrels, which are adapted to co-operate with stops, coupled each with an adjustable eccentric, driven by the driving mechanism of the machine.

In the device according to the invention the Wire guides move with the frame in a direction parallel to -the shaft accommodating the armature. The relative turn between the armature and the wire guides takes place in the novel device in that the armature is turned relatively to the wire guides at any instant when the rectilinear movement of the frame reverses its direction. This means that only small masses take part in the angular displacement and that the larger masses perform only a rectilinear movement.

The said turn may be achieved in a simple manner by arranging, on the driving shaft of the machine, a cam disc of which the edge is provided with a groove which is engaged by an extension of a toothed rack capable of'moving parallel to the driving shaft, this toothed rack co-operating with a driver coupled with the central shaft of the machine, the arrangement being such that after a turn of the cam disc through the toothed rack is displaced in a transverse direction and the central shaft is turned through a given angle, Whereas after a further turn of the cam disc through 180 the same movement is performed in opposite direction.

The rectilinearmovement of the frame may be obtained in a simple manner by providing the cam disc on the front side with a diametrical slot, in which a member provided with a pin at right angles thereto can be fixed, this pin extending in a slider adapted to move in a slot provided transversely in the frame;

The invention will be described more fully with reference to the drawing.

In the drawing:

FIG. 1 shows diagrammatically and perspectively the general construction of the armature-winding machine according to the invention with the parts shown in FIG. 2 broken away for purposes of clarity.

FIG. 2 shows the mechanism by means of which the amplitude of the radial movement of the wire guides can be adjusted.

The device according to the invention is housed in a cabinet or a housing, shown only partly and diagrammatically in the drawing and designated by l. The machine comprises furthermore a frame 2, which is guided by guides 4, to which end two columns 3 are secured. In the embodiment shown the frame 2 is adapted to move up and down, which is indicated by the arrow P. At the top, on the columns 3, provision is made of a platform 5, which, as is shown in the drawing, has a central opening. On the platform 5 are mounted a few wire guides 6, which are radially movable, as indicated by the arrow Q. The number of wire guides 6 corresponds with the maximum number of slots of the armature to be wound. Each wire guide 6-is mounted on a bent lever, which is pivoted at 7 to the platform and which co-operates at its free end with a lug 8, forming part of a ring 9. This ring is adapted to turn in a manner to be described hereinafter through a given angle and is subjected to the action of a spring 4a, which tends to hold the ring 9 against a stop 4b. The direction of rotation of the ring 9 is indicated in the drawing by the arrow R. On the frame provision is made for a pulley or disc 11, which is freely rotatable and to which a chain '10 or the like is fastened. On the other end the chain 10 is fastened to the ring 9. When the pulley 11 is turned, the chain 10 will catch the ring 9 and as soon as the force causing the pulley 11 to rotate is no longer available, the ring 9 will be drawn back into its end position in the manner described above.

13, 14 and 15, which are freely rotatable and of which the pulley 12 is coupled with the pulley 11. Around the pulleys 12, 13, 14 and 15 is wound an endless chain 16, the purpose of which will be dealt with hereinafter. In the centre of the frame 2 extends the shdt 17, which serves to accommodate the armature to be wound. On the shaft 17 is seated a driver 18, which is adapted to co-operate with a toothed rack 19, which is displaceable in a transverse direction, the driver 18 and hence the shaft 17 being thus turned through an angle. The movement of the toothed rack 19 is indicated by the arrow S. The toothed rack is provided with an extension 20. This extension rides in a groove 21 of a cam disc 22. The groove 21 is constructed so that, when the cam disc turns through 180, the toothed rack 19 is displaced over a given distance, so that the shaft 17 is turned through a given angle. When the cam disc 22 again turns through 180, the toothed rack 19 is moved in the opposite direction, so that the shaft 17 turns back into its initial position. On the front side of the cam disc 22 is provided a diametrically extending groove 23, in which the member 24 can be fixed in a given position. The pin 25 is orthogonal to the member 24 and extends in a slider, which is displacable in a transverse direction in a slot of the frame 2. When the cam disc 22 is turned, the frame 2 will move vertically up and down. The cam disc 22 is driven by the main shaft or driving shaft 25 of the machine; this shaft 26 is coupled via a rope disc 27 or the like with an electric motor. On the main shaft 26 is seated a second rope disc 28, which is coupled via a rope or the like with gear reduction train or the like 29 (see FIG. 2), which is adapted to drive a shaft 31 via a rope disc 30. The shaft 31 is provided at both ends with adjustable eccentrics 32 and 33, which are coupled with cranks 34 and 35 respectively. The crank 34 is coupled with a stop 36 and the crank 35 with a stop 37. When the disc 30 is turned, the stops 36 and 37 will be displaced in a vertical sense. At the free ends the stops 36 and 37 (see FIG. 1) have a bore, designated by 38 in the stop 37. The chain 16 is provided with barrels 39, 40, which may be adjustable. The chain 16 is taken through the bores in the ends of the stops 36 and 37.

As stated above, the armature to be wound can be fastened to the shaft 17. After an armature has been pro vided with windings, a further armature is to be introduceable into the machine without the need for refastening the ends of the winding wire. This may be achieved from the outer side by means of manually operated member 41, so that the shaft 17 can be lowered. The shaft 17 exhibits inter alia the shape of a collet and the assembly is controlled by means of the lever 42, the set of gear wheels 43, 44, the shaft 45, a rope disc or chain 46, the shaft 47 and the mechanism 48.

The armature winding machine according to the invention operates as follows.

When the armature is fastened to the shaft 17 and the free ends of the winding wires are secured by known means to, for example, the shank of the armature, the arrangement is started. When the main shaft 26 turns, the cam disc 22 will follow the movement so that the pin 25 will move the frame 2 in a vertical sense. After one complete revolution of the cam disc 22, the frame 2 has performed once an upward and downward movement. When the frame 2 arrives substantially at the topmost position, after the cam disc has tumed through 180 out of the position shown, the toothed rack 19 will be urged by the co-operation between the pin and the groove 21 in the direction of the shaft 17, so that the shaft 17 with the armature held therein is turned through an angle. When the cam disc 22 reoccupies the position shown at the end of the verical downward movement the pin 20 is pushed back, which movement is followed up by the toothed rack 19, so that the driver 18 and hence the shaft 17 are turned back through the same angle as before.

The upward and downward movement of the frame 2 is followed up by the chain 16. However, the position of the chain is not changed in this way. As soon as the barrel 4% comes into contact with the stop 37, the chain 16 is held, which results in a rotary movement of the pulleys 12, 13, 14 and 15. Since the pulley 12 is coupled with the pulley 11, also the latter is turned and the chain 10 joins this rotary movement so that the ring 9 is turned through a given angle. Thus all wire guides 6 are displaced in the direction towards the armature. When the frame 2 moves downwards and the barrel 40 is no longer in contact with the stop 37, the ring 9 returns under spring action into the initial position and all wire guides 6 will also return into their initial positions. During the downward movement of the frame 2, however, the barrel 39 of the chain 16 comes into contact with the stop 36, so that the chain 16 will again cause the pulleys 12, 13, 14 and 15 and hence also the pulley 11 to turn. The ring 9 is again turned so that the wire guides 6 again approach the armature more closely. However, since the stops 36 and 37 do not occupy a fixed position, but change their positions slowly due to the reduction train 29, the amplitude of the radial movement of the wire guides 6 will also vary. The winding wire supplied by the wire guides 6 is thus arranged at a different point in the armature slots, which permits of filling the slots very uniformly, so that the copper filling factor can be increased materially. The wire is arranged not only uniformly in the slots, but also the winding head is considerably more rigid, better filled and is nearer the armature in contradistinction to an armature winding machine in which the amplitude of the radial movement of the wire guides is not varied.

What is claimed is:

1. An armature winding machine comprising a rotatably mounted armature core support means, means to oscillate said core support means, wire guide means radially disposed relative to said core support means, means to radially reciprocate said wire guide means relative to said core support means, means to reciprocate said wire guide means in a plane parallel to the longitudinal axis of an armature core mounted on said core support means, and means connected with said means to reciprocate said wire guide means in the plane parallel to the axis of said core support means for varying the radial movement of said wire guide means.

2. An armature winding machine comprising a rotatably mounted armature core support, means to oscillate said core support means, a platform member, wire guide means reciprocally mounted on said platform radially disposed relative to said core support means, means to reciprocate said platform in a direction parallel to the longitudinal axis of said core support means, driven cam means to drive said means to oscillate said core support means and simultaneously reciprocate said platform, means to radially reciprocate said wire guide means, and means to vary the radial movement of said wire guide means.

3. An armature winding machine comprising a rotatably mounted armature core support, driven rack and pinion means to oscillate said core support means, a platform member, wire guide means movably mounted on said platform, means to drive said wire guide means including a bell crank lever and operatively associated ring member to reciprocate said wire guide means radially relative to said core support, a frame member supporting said platform, means to reciprocate said frame and platform parallel to the longitudinal axis of said core support and simultaneously drive said rack and pinion to oscillate said core support in predetermined timed relation, means operatively associated with said frame for oscillating said ring member, and means operatively associated with said last named means to vary the amplitude of oscillation of said ring member.

4. Apparatus according to claim 3 wherein said means to vary the amplitude of oscillation of said ring member comprises an endless chain means and associated disc wheels attached to said platform and said frame for relato simultaneously reciprocate said platform and drive said rack and pinion to oscillate said core support comprises a oam disc having a peripheral cam groove, a pin at one end of said rack operatively associated with said cam groove, said disc also having a diametric slot in one face thereof, a crank member slideable in said slot and connected to said frame member to reciprocate said' platfcrm.

References Cited in the file of this patent UNITED STATES PATENTS Hunsdorf Aug. 7, 1945 Larsh Jan. 31, 1961 

1. AN ARMATURE WINDING MACHINE COMPRISING A ROTATABLY MOUNTED ARMATURE CORE SUPPORT MEANS, MEANS TO OSCILLATE SAID CORE SUPPORT MEANS, WIRE GUIDE RADIALLY DISPOSED RELATIVE TO SAID CORE SUPPORT MEANS, MEANS TO RADIALLY RECIPROCATE SAID WIRE GUIDE MEANS RELATIVE TO SAID CORE SUPPORT MEANS, MEANS TO RECIPROCATE SAID WIRE GUIDE MEANS IN A PLANE PARALLEL TO THE LONGITUDINAL AXIS OF AN ARMATURE CORE MOUNTED ON SAID CORE SUPPORT MEANS, AND MEANS CONNECTED WITH SAID MEANS TO RECIPROCATE SAID WIRE GUIDE MEANS IN THE PLANE PARALLEL TO THE AXIS OF SAID CORE SUPPORT MEANS FOR VARYING THE RADIAL MOVEMENT OF SAID WIRE GUIDE MEANS. 